Delete sync photos from another computer

I no longer have access to the computer I originally used to sync some photos to my iPad mini. I've read through many of these threads on how to delete photos and sync photos but from what I understand, I cannot delete photos from my iPad that were sync'd there using another computer. If that's true, I have a real problem with that. First, these are my photos and the iPad is my device, so I own this stuff. I should be able to do what ever I want with them. I don't understand how Apple can lock down these apps so tight that the user has little control over their own stuff. If I want to delete my stuff I should be able to, no questions. I'm a little frustrated to say the least. So, can someone please chime in here and help? Thanks!